Self-healing conjugated polymer, composition for forming self-healing photoactive layer including the conjugated polymer and organic solar cell including photoactive layer formed using the composition

A composition for forming a self-healing photoactive layer, comprising a solvent and a conjugated polymer represented by Formula I:

• wherein R1, R2, R4, and R5 are identical to or different from each other and are each independently a group represented by Structure 1:
• (wherein R7 and R8 are identical to or different from each other and are each independently selected from hydrogen atoms, halogen atoms, cyano groups, nitro groups, hydroxyl groups, amide groups, ester groups, ketone groups, thioester groups, silyl groups, and substituted or unsubstituted C1-C30 alkyl groups and the asterisk (*) represents a bonding site to the backbone), R3 is selected from the group consisting of substituted or unsubstituted C1-C6 alkyl groups, substituted or unsubstituted C7-C30 alkyl groups, substituted or unsubstituted C5-C35 alkylthionyl groups, and substituted or unsubstituted C3-C30 cycloalkyl groups, R6 is a C1-C10 alkylene group, x is real number satisfying 0.1≤x≤0.9, and n is an integer from 5 to 100,000.